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Unformatted text preview: The 30 H inductor is in parallel with a short circuit, which is equivalent to a short circuit. After making these simplifications, we have Then P7.81 Then Next P7.87 The capacitor voltage and inductor current dont change instantaneously and so are the keys to solving this problem. Label the capacitor voltage and inductor current as shown. Before t = 0, with the switch open and the circuit at steady state, the inductor acts like a short circuit and the capacitor acts like an open circuit. The capacitor voltage and inductor current dont change instantaneously so and After the switch closes the circuit looks like this: From KCL: From KVL: At...
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 Winter '10
 xiejiang

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